.banner {
	width: 100%;
}

.banner img {
	display: block;
	width: 100%;
}

.main {
	background-color: #FFFFFF;
	padding-top: 100px;
}

.main .main_bottom .contacts h4.title {
	font-family: pingfangm;
	font-size: 45px;
	font-weight: 500;
	color: #231815;
	text-align: center;
	line-height: 85px;
	background-image: url(../images/index_title_bg.png);
	background-repeat: no-repeat;
	background-position: bottom center;
}

.main .main_bottom .contacts ul {
	display: flex;
	flex-flow: row nowrap;
	justify-content: space-between;
	margin-top: 80px;
}

.main .main_bottom .contacts ul li {
	width: calc((100% - 120px) / 4);
	height: 370px;
	background-image: url(../images/contact_bg1.png);
	background-repeat: no-repeat;
	background-position: center center;
}

.main .main_bottom .contacts ul li .icon {
	width: 90px;
	height: 104px;
	background-image: url(../images/contact_bg2.png);
	background-size: cover;
	background-position: center center;
	margin: 0 auto;
	margin-top: 84px;
	padding-top: 30px;
	box-sizing: border-box;
}

.main .main_bottom .contacts ul li .icon img {
	display: block;
	margin: 0 auto;
}

.main .main_bottom .contacts ul li h4 {
	font-family: pingfangm;
	font-size: 22px;
	color: #333333;
	text-align: center;
	line-height: 38px;
	margin-top: 22px;
}

.main .main_bottom .contacts ul li p {
	font-family: pingfangr;
	font-size: 14px;
	color: #808080;
	text-align: center;
	line-height: 28px;
}


.main .main_bottom #map {
	width: 100%;
	height: 600px;
	box-sizing: border-box;
	margin-top: 120px;
	margin-bottom: 145px;
}

.main .main_bottom .message {
	padding-bottom: 100px;
}

.main .main_bottom .message h4.title {
	font-family: pingfangm;
	font-size: 45px;
	color: #231815;
	text-align: center;
	line-height: 85px;
	background-image: url(../images/index_title_bg.png);
	background-repeat: no-repeat;
	background-position: bottom center;
	margin-bottom: 60px;
}

.main .main_bottom .mess_info ul li.submit input {
	background-image: url(../images/submit.png);
	cursor: pointer;
}

@media screen and (max-width: 550px) {
    
    .banner img {
        width: 150%;
        margin-left: -30%;
    }
	
	.main {
		padding-top: 20px;
	}
	
	.main .main_bottom .contacts h4.title {
		font-size: 34px;
	}
	
	.main .main_bottom .contacts ul {
		flex-flow: row wrap;
		box-sizing: border-box;
		padding: 0 10px;
		margin-top: 30px;
	}
	
	.main .main_bottom .contacts ul li {
		width: calc((100% - 10px ) / 2);
		height: 240px;
		margin-bottom: 10px;
		background-size: cover;
	}
	
	.main .main_bottom .contacts ul li .icon {
		margin-top: 20px;
	}
	
	.main .main_bottom .contacts ul li h4 {
		margin-top: 0px;
	}
	
	.main .main_bottom #map {
		margin-top: 30px;
		height: 200px;
		margin-bottom: 40px;
	}
	
	.main .main_bottom .message h4.title {
		font-size: 34px;
		margin-bottom: 20px;
	}
	
	.main .main_bottom .mess_info ul li.submit input {
		background-image: none;
	}
	
}